%0 Journal Article %A M. I. Muminov %A U. R. Shodiev %T On the essential spectrum of a four-particle Schrödinger operator on a lattice %J Matematičeskie trudy %D 2010 %P 169-185 %V 13 %N 1 %U http://geodesic.mathdoc.fr/item/MT_2010_13_1_a7/ %G ru %F MT_2010_13_1_a7